One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,13)(14,16)(18,21)(22,24)(26,30)(27,31) involution — undirected(2,5)(6,8)(10,12)(11,16)(17,18,20,21)(19,22,23,24)(25,26)(27,32)(28,31)(29,30)(3,7)(6,8)(10,12)(14,15)(19,23)(22,24)(26,30)(28,32) involution — undirected(1,2)(3,8)(4,5)(6,7)(9,11)(10,14)(12,15)(13,16)(17,18)(19,24)(20,21)(22,23)(25,27)(26,28)(29,31)(30,32) involution — undirected(1,3,4,7)(2,6,5,8)(9,12,13,10)(11,14,16,15)(17,19,20,23)(18,22,21,24)(25,28)(26,31)(27,30)(29,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.